Global Patent Index - EP 0716528 B1

EP 0716528 B1 2002-09-18 - Acquisition of carrier phase and symbol timing through joint estimation of phase and timing adjustments

Title (en)

Acquisition of carrier phase and symbol timing through joint estimation of phase and timing adjustments

Title (de)

Rückgewinnung der Trägerphase und des Symboltakts durch Abschätzung der Phase und des Takts

Title (fr)

Acquisition de la phase de la porteuse et de la synchronisation de symbole par estimation d'adjustements de phase et d'horloge

Publication

EP 0716528 B1 (EN)

Application

EP 95650044 A

Priority

US 35179794 A

Abstract (en)

[origin: EP0716528A2] A signal acquisition system rapidly acquires carrier phase and symbol timing of a received PSK-modulated communication signal (24) having a 110-symbol pattern through joint estimation of carrier-phase adjustment and symbol-timing adjustment by processing a common set of sampled data. A reference signal (22) at a local oscillator frequency is mixed with a received communication signal (24) to provide the communication signal (26) at an intermediate frequency. The intermediate-frequency communication signal (26) is converted into a digital communication signal (28), which is formatted into in-phase (I) and quadrature-phase (Q) components. A sampling circuit (18) samples the I components at twice a predetermined symbol rate to provide a first series of I-component samples at the predetermined symbol rate and a second series of I-component samples that are intermediate to the first series of I-component samples and at the predetermined symbol rate, and for sampling the Q components at twice the predetermined symbol rate to provide a first series of Q-component samples at the predetermined symbol rate and a second series of Q-component samples that are intermediate to the first series of Q-component samples and at the predetermined symbol rate. A processor (20) processes the samples to estimate a phase-adjustment value phi A and a symbol-timing-adjustment value STA. The phase of the reference signal (22) is adjusted in accordance with the phase-adjustment value phi A and the timing of the sampling is adjusted in accordance with the symbol-timing-adjustment value STA. <IMAGE>

IPC 1-7 (main, further and additional classification)

H04L 27/227; H04L 7/033; H04L 7/04

IPC 8 full level (invention and additional information)

H04L 7/033 (2006.01); H04L 27/227 (2006.01)

CPC (invention and additional information)

H04L 27/2272 (2013.01); H04L 7/0334 (2013.01)

Designated contracting state (EPC)

DE ES FR GB IT NL

EPO simple patent family

EP 0716528 A2 19960612; EP 0716528 A3 19980930; EP 0716528 B1 20020918; CN 1080052 C 20020227; CN 1136251 A 19961120; DE 69528240 D1 20021024; DE 69528240 T2 20030515; ES 2180616 T3 20030216; US 5544200 A 19960806

INPADOC legal status


2007-02-16 [REG ES FD2A] ANNOUNCEMENT OF LAPSE IN SPAIN

- Effective date: 20051128

2006-11-03 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20060731

2006-08-01 [NLV4] NL: LAPSED OR ANULLED DUE TO NON-PAYMENT OF THE ANNUAL FEE

- Effective date: 20060601

2006-07-31 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: FR

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20060731

2006-07-26 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20051127

2006-06-01 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20060601

2006-06-01 [PG25 NL] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: NL

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20060601

2005-11-28 [PG25 ES] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: ES

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20051128

2005-11-27 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20051127

2005-11-27 [PG25 IT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: IT

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20051127

2004-11-30 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20041130

- Year of fee payment: 10

2004-11-30 [PGFP NL] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: NL

- Payment date: 20041130

- Year of fee payment: 10

2004-11-24 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Payment date: 20041124

- Year of fee payment: 10

2004-11-22 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20041122

- Year of fee payment: 10

2004-11-05 [PGFP ES] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: ES

- Payment date: 20041105

- Year of fee payment: 10

2003-09-10 [26N] NO OPPOSITION FILED

- Effective date: 20030619

2003-04-11 [ET] FR: TRANSLATION FILED

2003-02-16 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2180616 T3

2002-10-24 [REF] CORRESPONDS TO:

- Document: DE 69528240 20021024

2002-09-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE ES FR GB IT NL

2002-09-18 [REG GB FG4D] EUROPEAN PATENT GRANTED

1999-11-10 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19990924

1999-08-11 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: LINKABIT WIRELESS, INC.

1999-02-24 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19981217

1998-09-30 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): DE ES FR GB IT NL

1996-06-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE ES FR GB IT NL